drivers: irqchip: pdc: additionally set type in SPI config registers

GPIOs that can be configured as wakeup are routed to the PDC wakeup
interrupt controller and from there to the GIC interrupt controller. On
some QCOM SoCs, the interface to the GIC for wakeup capable GPIOs have
additional hardware registers that need to be configured as well to
match the trigger type of the GPIO. This register interfaces the PDC to
the GIC and therefore updated from the PDC driver.

Typically, the firmware intializes the interface registers for the
wakeup capable GPIOs with commonly used GPIO trigger type, but it is
possible that a platform may want to use the GPIO differently. So, in
addition to configuring the PDC, configure the interface registers as
well.

Change-Id: Ic10a210da6139319e395039d2c3ddf5d5f9768e4
Signed-off-by: Lina Iyer <ilina@codeaurora.org>